3 years ago

Jane has 60 liters of 70% of acid solution. How many liters of water must be added to form a solution that is 40% acid?

1 answer:

4 0

Let w = liters of water needed
4.70= acid in 40% solution

4.70/70+w = .28

28=.28.(70+w)
70+w=100
w=30

30 liters of water is needed

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hmm, they try to make it difficult

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